If you're flying this summer, you might get pulled aside by TSA if you find these four letters on your boarding pass.

Add Yahoo as a preferred source to see more of our stories on Google. As the temperatures rise and the skies clear up, you might be looking forward to a summer vacation. But before flying to your ...

As the temperatures rise and the skies clear up, you might be looking forward to a summer vacation. But before flying to your destination, you'll have to go through screening at a TSA checkpoint.

The code "SSSS" on a boarding pass stands for "Secondary Security Screening Selection," requiring additional screening at TSA checkpoints. Reasons for the "SSSS" code can include last-minute ticket ...